version 7.4 rc1

While this allows a trigger to fire at the end of a statement, it does not allow the trigger to access all rows modified by the statement. This capability is planned for a future release.
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Add check constraints for domains (Rod)

This greatly increases the usefulness of domains by allowing them to use check constraints.
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Add ALTER DOMAIN (Rod)

This allows manipulation of existing domains.

Looks like you guys got your wish, at least in part. There are many other exciting additions and changes in this release, I am going to try and install this version at home later today and see how the install/configure goes